Guidelines Interpretations

FGI offers a forum for obtaining interpretations of the Guidelines text. This process gives designers, owners, and authorities having jurisdiction the opportunity to seek insight from HGRC members on language that may be ambiguous or conflict with other sections of the document.

To ask a question:

Before submitting a request for an interpretation, please read the rules. Many of the requests we receive are actually requests for an advisory opinion, which we are usually able to provide more quickly.


Read published interpretations for the following editions:


Find published interpretations for ANSI/ASHRAE/ASHE 170: Ventilation of Health Care Facilities:

Digital Copy Sign-In

So we can maintain a free read-only version of the Guidelines accessible to all users, we ask you to register for a free viewing account and subsequently to sign in with your member credentials.

Digital Copy Sign Up

Before you can access the Guidelines online, please take a moment to tell us about yourself. collects information for internal use only, your information will never be shared or sold.

A password will be e-mailed to you.